CVE-2026-8878

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-03. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Version 3.0.7 of the Securly Chrome Extension exposes multiple publicly accessible endpoints that allow unauthenticated access to sensitive data. The exposed information consists of SHA-1 hashes that are inadequately obfuscated using a simple Caesar cipher, which can be easily reversed to recover the original hash values and access the protected data.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
11.3%
KEV
Not listed

Published

June 3, 2026

Last Modified

June 4, 2026

Advisory Details (1)

Auto-updated Jun 4, 2026
No patch confirmed yet. Sources: cert.
cert

VU#595768 - Securly Chrome Extension contains multiple weak encryption and access control vulnerabilities

https://kb.cert.org/vuls/id/595768

Vendor Advisories for CVE-2026-8878(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 105× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 136 total refreshes for this CVE.

  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-12 00:55 UTCEG score recompute
  3. 2026-07-12 00:55 UTCGHSA enrichment
  4. 2026-07-11 12:36 UTCEG score recompute
  5. 2026-07-11 12:36 UTCGHSA enrichment
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-09 06:44 UTCEG score recompute
  9. 2026-07-09 06:44 UTCGHSA enrichment
  10. 2026-07-08 16:22 UTCEG score recompute
  11. 2026-07-08 16:21 UTCGHSA enrichment
  12. 2026-07-08 15:16 UTCEPSS rescore
  13. 2026-07-07 13:46 UTCEPSS rescore
  14. 2026-07-06 16:27 UTCEPSS rescore
  15. 2026-07-06 02:23 UTCEPSS rescore
  16. 2026-07-06 02:23 UTCEPSS rescore
  17. 2026-07-05 02:31 UTCEPSS rescore
  18. 2026-07-05 02:30 UTCEPSS rescore
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 19:41 UTCEG score recompute
  22. 2026-07-03 19:41 UTCGHSA enrichment
  23. 2026-07-02 12:29 UTCEG score recompute
  24. 2026-07-02 12:29 UTCGHSA enrichment
  25. 2026-07-01 23:21 UTCEG score recompute
Show 75 more
  1. 2026-07-01 23:21 UTCGHSA enrichment
  2. 2026-07-01 15:07 UTCEPSS rescore
  3. 2026-07-01 10:14 UTCEG score recompute
  4. 2026-07-01 10:14 UTCGHSA enrichment
  5. 2026-06-30 23:22 UTCEPSS rescore
  6. 2026-06-30 21:55 UTCEG score recompute
  7. 2026-06-30 21:55 UTCGHSA enrichment
  8. 2026-06-29 23:10 UTCEG score recompute
  9. 2026-06-29 23:10 UTCGHSA enrichment
  10. 2026-06-29 14:06 UTCEPSS rescore
  11. 2026-06-29 10:48 UTCEG score recompute
  12. 2026-06-29 10:48 UTCGHSA enrichment
  13. 2026-06-28 17:03 UTCEG score recompute
  14. 2026-06-28 17:03 UTCGHSA enrichment
  15. 2026-06-28 14:07 UTCEPSS rescore
  16. 2026-06-28 04:56 UTCEPSS rescore
  17. 2026-06-28 04:43 UTCEG score recompute
  18. 2026-06-28 04:43 UTCGHSA enrichment
  19. 2026-06-27 16:11 UTCEG score recompute
  20. 2026-06-27 16:11 UTCGHSA enrichment
  21. 2026-06-27 03:48 UTCEG score recompute
  22. 2026-06-27 03:48 UTCGHSA enrichment
  23. 2026-06-27 03:08 UTCEPSS rescore
  24. 2026-06-26 15:12 UTCEG score recompute
  25. 2026-06-26 15:12 UTCGHSA enrichment
  26. 2026-06-25 23:01 UTCEG score recompute
  27. 2026-06-25 23:01 UTCGHSA enrichment
  28. 2026-06-25 13:50 UTCEPSS rescore
  29. 2026-06-25 10:41 UTCEG score recompute
  30. 2026-06-25 10:41 UTCGHSA enrichment
  31. 2026-06-24 22:20 UTCEG score recompute
  32. 2026-06-24 22:20 UTCGHSA enrichment
  33. 2026-06-24 14:05 UTCEPSS rescore
  34. 2026-06-24 09:19 UTCEG score recompute
  35. 2026-06-24 09:19 UTCGHSA enrichment
  36. 2026-06-23 21:33 UTCEPSS rescore
  37. 2026-06-23 19:00 UTCEG score recompute
  38. 2026-06-23 19:00 UTCGHSA enrichment
  39. 2026-06-22 14:25 UTCEPSS rescore
  40. 2026-06-21 14:56 UTCEPSS rescore
  41. 2026-06-21 01:59 UTCEPSS rescore
  42. 2026-06-20 12:33 UTCEG score recompute
  43. 2026-06-20 12:32 UTCGHSA enrichment
  44. 2026-06-19 20:34 UTCEG score recompute
  45. 2026-06-19 20:34 UTCGHSA enrichment
  46. 2026-06-19 19:26 UTCEPSS rescore
  47. 2026-06-18 22:40 UTCEG score recompute
  48. 2026-06-18 22:40 UTCGHSA enrichment
  49. 2026-06-18 17:52 UTCEPSS rescore
  50. 2026-06-18 10:20 UTCEG score recompute
  51. 2026-06-18 10:20 UTCGHSA enrichment
  52. 2026-06-17 22:00 UTCEG score recompute
  53. 2026-06-17 21:59 UTCGHSA enrichment
  54. 2026-06-17 09:40 UTCEG score recompute
  55. 2026-06-17 09:40 UTCGHSA enrichment
  56. 2026-06-16 21:20 UTCEG score recompute
  57. 2026-06-16 21:20 UTCGHSA enrichment
  58. 2026-06-16 17:53 UTCEPSS rescore
  59. 2026-06-16 09:01 UTCEG score recompute
  60. 2026-06-16 09:01 UTCGHSA enrichment
  61. 2026-06-15 20:15 UTCEG score recompute
  62. 2026-06-15 20:15 UTCGHSA enrichment
  63. 2026-06-15 17:49 UTCEPSS rescore
  64. 2026-06-15 17:49 UTCEPSS rescore
  65. 2026-06-15 07:47 UTCEG score recompute
  66. 2026-06-15 07:47 UTCGHSA enrichment
  67. 2026-06-14 23:18 UTCEPSS rescore
  68. 2026-06-14 19:23 UTCEG score recompute
  69. 2026-06-14 19:23 UTCGHSA enrichment
  70. 2026-06-14 07:04 UTCEG score recompute
  71. 2026-06-14 07:04 UTCGHSA enrichment
  72. 2026-06-13 23:00 UTCEPSS rescore
  73. 2026-06-13 18:44 UTCEG score recompute
  74. 2026-06-13 18:44 UTCGHSA enrichment
  75. 2026-06-13 05:57 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8878?
CVE-2026-8878 is a high vulnerability published on June 3, 2026. Version 3.0.7 of the Securly Chrome Extension exposes multiple publicly accessible endpoints that allow unauthenticated access to sensitive data. The exposed information consists of SHA-1 hashes that are inadequately obfuscated using a simple Caesar cipher, which can be easily reversed to recover…
When was CVE-2026-8878 disclosed?
CVE-2026-8878 was first published in the National Vulnerability Database on June 3, 2026, with the most recent update on June 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8878 actively exploited?
CVE-2026-8878 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8878?
CVE-2026-8878 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-8878?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8878, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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